/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime(time, cFormat) {
   if (arguments.length === 0 || !time) {
      return null
   }
   const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
   let date
   if (typeof time === 'object') {
      date = time
   } else {
      if (typeof time === 'string') {
         if (/^[0-9]+$/.test(time)) {
            // support "1548221490638"
            time = parseInt(time)
         } else {
            // support safari
            // https://stackoverflow.com/questions/4310953/invalid-date-in-safari
            time = time.replace(new RegExp(/-/gm), '/')
         }
      }

      if (
         typeof time === 'number' &&
         time.toString().length === 10
      ) {
         time = time * 1000
      }
      date = new Date(time)
   }
   const formatObj = {
      y: date.getFullYear(),
      m: date.getMonth() + 1,
      d: date.getDate(),
      h: date.getHours(),
      i: date.getMinutes(),
      s: date.getSeconds(),
      a: date.getDay()
   }
   const time_str = format.replace(
      /{([ymdhisa])+}/g,
      (result, key) => {
         const value = formatObj[key]
         // Note: getDay() returns 0 on Sunday
         if (key === 'a') {
            return [
               '日',
               '一',
               '二',
               '三',
               '四',
               '五',
               '六'
            ][value]
         }
         return value.toString().padStart(2, '0')
      }
   )
   return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime(time, option) {
   if (('' + time).length === 10) {
      time = parseInt(time) * 1000
   } else {
      time = +time
   }
   const d = new Date(time)
   const now = Date.now()

   const diff = (now - d) / 1000

   if (diff < 30) {
      return '刚刚'
   } else if (diff < 3600) {
      // less 1 hour
      return Math.ceil(diff / 60) + '分钟前'
   } else if (diff < 3600 * 24) {
      return Math.ceil(diff / 3600) + '小时前'
   } else if (diff < 3600 * 24 * 2) {
      return '1天前'
   }
   if (option) {
      return parseTime(time, option)
   } else {
      return (
         d.getMonth() +
         1 +
         '月' +
         d.getDate() +
         '日' +
         d.getHours() +
         '时' +
         d.getMinutes() +
         '分'
      )
   }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj(url) {
   const search = decodeURIComponent(
      url.split('?')[1]
   ).replace(/\+/g, ' ')
   if (!search) {
      return {}
   }
   const obj = {}
   const searchArr = search.split('&')
   searchArr.forEach(v => {
      const index = v.indexOf('=')
      if (index !== -1) {
         const name = v.substring(0, index)
         const val = v.substring(index + 1, v.length)
         obj[name] = val
      }
   })
   return obj
}

// 将列表型数据，转换成树形数据 => 递归算法 => 自身调用自身 =>
// 调用时一定条件不能一样，否则死循环
// 遍历树形，有一个重点，要先找一个头
// 所有的根节点 Pid 为空
// 第一次 rootValue 为空字符串
export function tranListToTreeData(list, rootValue) {
   // debugger
   var arr = []
   list.forEach(item => {
      if (item.pid === rootValue) {
         // 找到之后，就要去找 item 下边有没有 子节点
         // 本身这个方法就是找子节点的，所以看再次调用
         const children = tranListToTreeData(list, item.id)
         // children 的长度有可能为空
         if (children.length) {
            // 如果 长度大于 0 说明找到了子节点
            item.children = children
         }
         // 将内容加入到数组中
         arr.push(item)
      }
   })
   return arr
}
